surreptitious /sur-əp-tishˈəs/

1. Done by stealth or fraud
2. Stealthy

• Partnership for Peace
• partnerships
• part-off
• part-offs
• part of speech
• parton
• partons
• partook
• part-owner
• part-owners
• part-payment
• part-payments
• partridge
• partridgeberries
• partridgeberry
• partridges
• partridge-wood
• parts
• part-singing
• part-song
• part-songs
• part-time
• part-timed
• part-timer
• part-timers